I can deal with tones to an extent but when you get into those Southeast Asian languages where tone and something called "register" interact in various ways, I'm just confused. Like "the low-dipping tone is glottalized as well as featuring traits of creaky voice." What the hell?

For Vietnamese in particular I think it looks ugly, but that's something different from its sound.

Although Vietnamese isn't the most beautiful sounding language one would first think of, spoken by certain people, it does have a certain beauty to it as with any language. Unfortunately, the majority of Vietnamese speakers speak it with "too much emphasis" leading to it sounding harsh and slurred. I'd say only 1 in every 4 or 5 Vietnamese speakers would sound "decent". Then again, it certainly isn't the harshest sounding language that I've come across, unfortunately Cantonese isn't any much better to me even though my dad speaks it fluently, and neither is Arabic, Thai or Khmer. Mandarin is starting to sound so repetitive to me.

As for the script, as much as I like Chữ Nôm more than Quốc Ngữ, it would be a waste of resources to change scripts, especially during this transitioning period within Vietnam.